clang/test/Modules/redundant-template-default-arg2.cpp

   1 // RUN: rm -rf %t
   2 // RUN: mkdir %t
   3 // RUN: split-file %s %t
   4 //
   5 // RUN: %clang_cc1 -std=c++20 %t/foo.cppm -I%t -emit-module-interface -o %t/foo.pcm
   6 // RUN: %clang_cc1 -fprebuilt-module-path=%t -std=c++20 %t/use.cpp -fsyntax-only -verify
   7
   8 //--- foo.cppm
   9 export module foo;
  10 export template <typename T = int>
  11 T v;
  12
  13 export template <int T = 8>
  14 int v2;
  15
  16 export template <typename T>
  17 class my_array {};
  18
  19 export template <template <typename> typename C = my_array>
  20 int v3;
  21
  22 //--- use.cpp
  23 import foo;
  24 template <typename T = int>
  25 T v; // expected-error {{declaration of 'v' in the global module follows declaration in module foo}}
  26      // expected-note@foo.cppm:3 {{previous declaration is here}}
  27
  28 template <int T = 8>
  29 int v2; // expected-error {{declaration of 'v2' in the global module follows declaration in module foo}}
  30         // expected-note@foo.cppm:6 {{previous declaration is here}}
  31
  32 template <typename T>
  33 class my_array {}; // expected-error {{redefinition of 'my_array'}}
  34                    // expected-note@foo.cppm:9 {{previous definition is here}}
  35
  36 template <template <typename> typename C = my_array>
  37 int v3; // expected-error {{declaration of 'v3' in the global module follows declaration in module foo}}
  38         // expected-note@foo.cppm:12 {{previous declaration is here}}